Question

A roller coaster car has a mass of 400kg and a speed of 15m/s What will be the P.E of this roller coaster car at its highest point ,where KE =0 at that point

Answer 1

Answer:

3000J

Explanation:

Given parameters:

mass  = 400kg

speed  = 15m/s

Unknown:

P.E at the highest point of the roller coaster = ?

Solution:

Due to the law of conservation of energy, the potential energy at the highest point can be solved using the formula of the kinetic energy

  Potential energy  = $\frac{1}{2}$ mv²

m is the mass

v is the velocity

    Potential energy =  $\frac{1}{2}$  x 400 x 15  = 3000J